The test was to determine the point of subjective equality by having subjects adjust line segments to equal the length of a standard line. Twenty-three subjects were tested in a repeated measures design with four different arrowhead angles and four line orientations. Each condition was tested in six randomized trials. The lines to be adjusted were tipped with outward pointing arrows of varying degrees of pointedness, whereas the standard lines had inward pointing arrows of the same degree.

Results showed that line lengths were overestimated in all cases. The size of error increased with decreasing arrowhead angles. For line orientation, overestimation was greatest when the lines were horizontal.

This last is contrary to our expectations. These results have important implications for human factors design applications such as graphical display interfaces.

The introduction is more narrowly focussed than the abstract. It states the objective of the experiment and provides the reader with background to the experiment. State the topic of your report clearly and concisely, in one or two sentences:. The purpose of this experiment was to identify the specific element in a metal powder sample by determining its crystal structure and atomic radius.

These were determined using the Debye-Sherrer powder camera method of X-ray diffraction. A good introduction also provides whatever background theory, previous research, or formulas the reader world cultures homework help to know. Usually, an instructor does not want you to repeat the lab manual, but to show your own comprehension of the problem.

If the amount of introductory material seems to be a lot, consider adding subheadings such as: Theoretical Principles or Background.

Introductions often create difficulties for students who struggle with keeping verb tenses straight. These two points should help you navigate the introduction:. Methods and Materials or Equipment can usually be a simple list, but make sure it is accurate and complete.

In some cases, you can simply direct the reader to a lab manual or standard procedure: Experimental Procedure describes the process in chronological order. Using clear paragraph structure, explain all steps in the order they actually happened, not as they were supposed to happen.

The Lab Report

If your professor says you can simply state that you followed the procedure in the manual, be sure you still document occasions when you did not follow that exactly e. Results are usually dominated by calculations, tables and figures; however, you still need to state all significant results explicitly in verbal form, for example:.

Graphics need to be clear, easily read, and well labeled e. Figure 1: Input Frequency and Capacitor Value. In most cases, providing a sample calculation is sufficient in the report. Leave the remainder in an appendix. Likewise, your raw data can be placed in an appendix. Refer to appendices as necessary, pointing out trends and identifying special features.

Discussion is the most important part of your report, because here, you show that you understand the experiment beyond the simple level of completing it.

By that, they mean this is what is not readily observable. If there were differences, how can you account for them? Be specific; for example, the instruments could not measure precisely, the sample was not pure or was contaminated, or calculated values did not take account of friction.

For most of the students, doing a practical experiment is very easy. However, when they start writing a lab report about this matter, lots of diverse skills are needed. Besides, there is a need of considerable time. When you have also the same problem, you may call our writers for writing the lab report. Our lab report writings prove our proficiency We have understood the fact that it is not easy to write a paper on some scientific theory.

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A lab report is the most essential party in any laboratory study.

It takes a lot of work, and, unsurprisingly, has a huge influence on your overall grade. Follow this guide to write the best lab report of your studying process!

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This is only a sample work, if you need your own paper you need to:. Lab Report: